PWR-INV (green) LED not lit - Inverter without power

What does PWR-INV LED off mean?

The green PWR-INV LED is off, indicating that the inverter unit is not receiving power. The inverter is crucial for controlling the compressor.

• Inverter is without power.
• Tripped fuse or circuit breaker supplying the inverter.
• Internal wiring fault to the inverter.

Click steps to track your progress.

1. 1

   Check the main circuit breaker and fuses for the Heat Pump and specifically the inverter to ensure stable power supply.

2. 2

   Turn off the Heat Pump at the main power switch for a few minutes, then turn it back on to attempt a system reset.

3. 3

   If the PWR-INV LED remains off, contact a qualified electrician or NIBE service technician to inspect the inverter's power connections.